/**
 * Copyright 2022-9999 the original author or authors.
 * <p>
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.binghe.im.platform.common.session;

import io.binghe.im.platform.common.exception.IMException;
import io.binghe.im.platform.common.model.constants.IMPlatformConstants;
import io.binghe.im.platform.common.model.enums.HttpCode;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

/**
 * @author binghe(微信 : hacker_binghe)
 * @version 1.0.0
 * @description Session上下文
 * @github https://github.com/binghe001
 * @copyright 公众号: 冰河技术
 */
public class SessionContext {

    public static UserSession getSession(){
        // 从请求上下文里获取Request对象
        ServletRequestAttributes requestAttributes = ServletRequestAttributes.class.
                cast(RequestContextHolder.getRequestAttributes());
        HttpServletRequest request = requestAttributes.getRequest();
        Object object = request.getAttribute(IMPlatformConstants.SESSION);
        if (object == null){
            throw new IMException(HttpCode.NO_LOGIN);
        }
        return  (UserSession) object;
    }
}
